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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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18 abr 1932 año - James Chadwick (1932): discovers existence of Neutrons, which have a similar mass to protons
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By
MILLER GRIMSLEY
17 sep 2018
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410
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18 abr 1932 año
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~ 93 years ago
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